# -*-coding:utf-8-*-
import time as t


class MyTimer:
    def __init__(self):
        self.unit = ['年', '月', '日', '小时', '分钟', '秒']
        self.prompt = "未开始计时！"
        self.lasted = []
        self.begin = 0
        self.end = 0

    # 开始计时
    def start(self):
        self.begin = t.localtime()
        self.prompt = "提示：请先调用stop()开始计时！"
        print("计时开始...")

    # 停止计时
    def stop(self):
        if not self.begin:
            print("提示：请先调用start（）开始计时！")
        else:
            self.end = t.localtime()
            self._calc()
            print("计时结束！")

    # 计算运行时间
    def _calc(self):
        self.lasted = []
        self.prompt = "共总运行了"
        for index in range(6):
            self.lasted.append(self.end[index] - self.begin[index])
            if self.lasted[index]:
                self.prompt += (str(self.lasted[index]) + self.unit[index])
        # 为下一轮计算初始化变量
        self.begin == 0
        self.end = 0

    # 重写一个魔法方法__add__()，让两个计时器对象相加会返回时间的和：
    def __add_(self, other):
        prompt = "总共运行了"
        result = []
        for index in range(6):
            result.append(self.lasted[index] + other.lasted[index])
            if result[index]:
                prompt += (str(result[index])) + self.unit[index]
        return prompt


t1 = MyTimer()
t1
t1.stop()
t1.start()
t1
t1.stop()
t1
t2 = MyTimer()
t2.start()
t2.stop()
t2
t1 + t2
